{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcacf6b5c093f91e8b26c38a3a8f7fdf73b59d44a03348ae824e4b053b4b95c71",
    "signature": "0xb1e12e4464f8d910271502e7fbf3451cc295a92ad527ec2adc8882c1f7cc685949529ba89a7f2c2208cf8c6923e3a6801fb78db8c1cc0de26406fadd921e9e191b",
    "signer": "0xdfe57c03CEbfAc8a0e56Fb424f5c286d229C98Fd",
    "userId": "526180075"
  }
}